Crosby IP IPHNM10 Manual De Instrucciones página 5

„ During the tensioning of cables or chains the clamps must remain properly positioned.
„ Remark: when handling the load, one should ensure that the load and or clamp does not
encounter obstacles which could release the load on the clamps prematurely.
„ A clamp is a device that must be clean when used. Dirt has an adverse effect on the operation
and also on the reliability of the clamp. When cleaning the clamp care should be taken to
ensuring that gripping surfaces are at all times clean, dry and free of oil and grease. Regular
cleaning will enhance the life and reliability of the lifting clamps. To clean the gripping surfaces,
3M Scotch-brite and LocTite SF 7063 are recommended.
3. Inspections protocols
Prior to every application of the clamp it is important the clamp operator inspects the clamp for
proper functioning. Attention must be paid to the following (see illustration(s) 2 for part reference):
„ Ensure that the plate surface with which the clamp is to come into contact is free of scale,
grease, oil, paint, water, ice, moisture, dirt and coatings that might impede the contact of the
gripping surface with the plate.
„ Inspect pressure pads (W) for wear and defects. The pressure pads should be undamaged and
free of moisture, dirt, grease and oil. If needed, clean them. 3M Scotch-brite and LocTite SF
7063 are recommended.
„ Check the body (N) and the jaw for damage, cracks or deformation (this may indicate
overloading). The clamp must open and close properly (when the operation of the clamp is stiff
or heavy, it should be removed from operation for inspection).
„ Check also the roll pins (P) which locks the camsegment shaft and hinge shaft.
„ Check the camsegment shaft (G) and hinge shaft (F) for readily detectable wear and/or
damage.
„ Check whether the W.L.L. and the jaw opening stamped on the body corresponds with the
load to be lifted. When this is no longer readable, remove the clamp from operation.
This type of clamp can prone to deformation of the hole in which the chain (D-shackle) impinges,
resulting in the hole becoming oval. When that is the case the clamp should be removed from
service immediately. Deformation in this part is mainly due to exceeding of the maximum side load-
ing angle of 15°. The maximum loading angles are displayed in the loading diagrams 1.
The pressure pads are the most critical parts in the clamp and require extra attention during inspec-
tion. Ensure that there are no pieces of the friction material missing as this could diminish the grip.
If more than 5% of the friction surface is damaged, the pressure pad should be replaced. On the
inside of the front cover illustrations have been included of damaged and worn (rejected) pressure
pads. In doubtful cases an authorised repairer should assess the clamp.
4. How to operate the clamp
IPHNM10 lifting clamps are suitable for horizontal lifting and transport of steel plates, beams and
structures that may not be damaged.
See illustrations 3 - 5 for part reference.
1. Place the clamps on the plate and exercise pressure, so that the inner side of the jaw rests
against the plate (E) (3).
2. Tension the cables or chains with the crane hook, while the inner side of the jaw rests against
the plate (E) (4).
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